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Search Publications

NIST Authors in Bold

Displaying 251 - 275 of 2768

Dissipative preparation of W states in trapped ion systems

July 2, 2021
Author(s)
Daniel Cole, Jenny Wu, Stephen Erickson, Panyu Hou, Andrew C. Wilson, Dietrich Leibfried, Florentin Reiter
… protocols for dissipative entanglement of three trapped-ion qubits, and we discuss in detail a scheme that uses … to generate one of six target W states in a three-ion qubit space. Using a beryllium-magnesium ion crystal as an example system, we theoretically …

Behavior of molecules and molecular ions near a field emitter

March 18, 2016
Author(s)
Ann C. Chiaramonti Debay, Baptiste Gault, Michael Ashton, Susan B. Sinnott, Michael P. Moody, David W. Saxey, D. K. Schreiber
… APT experiments often incorporate the detection molecular ions emitted from the specimen, in particular from covalently … an APT experiment by dissociation of metastable molecular ions. … Behavior of molecules and molecular ions near a field emitter …

Intercombination and Forbidden Transition Rates in C- and N-Like Ions (O 2+ , F 3+ and S 9+ ) Measured at a Heavy-Ion Storage Ring

August 1, 2000
Author(s)
E Trabert, A G. Calamai, John D. Gillaspy, G Gwinner, X Tordoir, A Wolf
… between the levels of the ground state in C-like ions of O and F and in N-like ions of S have been measured optically at a heavy-ion storage ring. The lifetime results, 1.250(13) ms for the … excited-state lifetime, Fluorine, highly-charged ion, oxygen, storage ring, sulfur, ultraviolet …

Imaging Nanophotonic Modes of Microresonators using a Focused Ion Beam

January 15, 2016
Author(s)
Kevin A. Twedt, Jie J. Zou, Marcelo I. Davanco, Kartik A. Srinivasan, Jabez J. McClelland, Vladimir A. Aksyuk
… local optomechanical perturbation using a focused lithium ion beam. An ion beam (radius ≈50 nm) induces a picometer-scale dynamic … Our technique also enables in-situ observation of ion implantation damage and relaxation dynamics in a silicon … microresonators, focused ion beams, optomechanics …

Effect of Mixing Ratio and pH on the Reaction Between Ca 4 (PO 4 ) 2 O and CaHPO 4

May 1, 2000
Author(s)
S Matsuya, Shozo Takagi, Laurence Chow
… shown to be responsible for the hardening of a calcium phosphate cement. This reaction was investigated by … of TTCP was the predominant reaction and both octacalcium phosphate and OHAp were formed, But, when HCI and KOH were … calcium phosphate cement, chemical reaction, dicalcium phosphate, …

Highly Charged Ion Bombardment of Silicon Surfaces

August 1, 2003
Author(s)
J E. Sanabia, S N. Goldie, L P. Ratliff, Lori S. Goldner, John D. Gillaspy
… In an attempt to verify these results, highly charged ion-irradiated silicon samples were prepared at the Electron Beam Ion Trap facility at the National Institute of Standards and … cross section, fluorescence, highly charged ion, photoluminescence, silicon … Highly Charged Ion Bombardment of Silicon Surfaces …

Communication-Comparison of Nanoscale Focused Ion Beam and Electrochemical Lithiation in beta-Sn Microspheres

December 5, 2016
Author(s)
Saya Takeuchi, William R. McGehee, Jennifer L. Schaefer, Truman M. Wilson, Kevin A. Twedt, Christopher L. Soles, Vladimir P. Oleshko, Eddie H. Chang, Jabez J. McClelland
… The development of Li focused ion beams (Li-FIB) enables controlled Li ion insertion into materials with nanoscale resolution. We … establishing the relevance of the Li-FIB for studies of ion dynamics in electrochemically active materials by … Li-FIB, lithium-ion battery, Sn …

Ion Coulomb crystals: an exotic form of condensed matter

August 24, 2025
Author(s)
Giovanna Morigi, John Bollinger, Michael Drewsen, Daniel Podolsky, Efrat Shimshoni
… fluorescence. These unique and unusual properties make ion crystals a powerful platform for studying phases of … theoretical framework and experimental characterization of ion Coulomb crystals from a condensed-matter perspective. We … exploring novel condensed matter phenomena with trapped ion crystals, as well as their many scientific and technical …

Designing artificial cells to harness the biological ion gradient

November 23, 2008
Author(s)
Jian Xu, David A. LaVan
… contain numerous natural nanoscale conductors, i.e. ion channels and ion pumps1-4, that work in concert to form transmembrane or transcellular ion gradients that can be triggered to release an action … electrocyte, ion channel, artificial cell, nanoconductor, biological …

Surface science for improved ion traps

September 30, 2013
Author(s)
David P. Pappas, Dustin Hite, Andrew C. Wilson, David T. Allcock, David J. Wineland, Dietrich Leibfried, Yves Colombe
… This noise has been an obstacle to progress in trapped-ion quantum information processing (QIP) experiments for more … sources. Experimental evidence of its dependence on ion-electrode distance, frequency, and electrode temperature … that it may not be a fundamental limit to trapped-ion QIP. Moreover, the extreme sensitivity of trapped ions to …

Al, B, and Ga Ion-Implantation Doping of SiC

November 1, 2000
Author(s)
E Handy, M V. Rao, O W. Holland, P Chi, K A. Jones, M A. Derenge, R D. Vispute, T Venkatesan
… A Series of single energy Al, B, and Ga ion implants were performed in the energy range 50 keV - 4 … to characterize the implant depth profiles using secondary ion mass spectrometry (SIMS). From the implant depth profiles … A1N, diffusion, Ion Implantation, SiC, SIMS …

Lipid Nanodomains Change Ion Channel Function

August 22, 2017
Author(s)
Michael NMN Weinrich, David Worcester, Sergey M. Bezrukov
… modulate protein function, but evidence for modulation of ion channels is lacking. Here we show in a cholesterol-rich … the dissociation kinetics of the gramicidin dimer, a model ion channel. … Lipid Rafts, Lipid Domains, Ion Channels, Lipid Phases, Nanodomains … Lipid Nanodomains Change Ion Channel Function …

Toward Spin Squeezing with Trapped Ions

September 23, 2010
Author(s)
John J. Bollinger, Hermann Uys, Michael Biercuk, Joseph W. Britton
… implementing spin squeezing with a cloud of beryllium ions in a Penning ion trap, via the geometric phase gate used … Toward Spin Squeezing with Trapped Ions …

Determination of Inorganic Ions in Mineral Water by Gradient Elution Moving Boundary Electrophoresis

October 1, 2010
Author(s)
Paul M. Flanigan IV, David J. Ross, Jonathan G. Shackman
… was developed for the determination of the major inorganic ions in commercial mineral waters using gradient elution … μmol/L to sub-μmol/L range. Calculated values of the major ions in three commercial mineral waters were compared to … Determination of Inorganic Ions in Mineral Water by Gradient Elution Moving Boundary …

Kinetic-energy Distributions of Positive and Negative Ions in Townsend Discharges in Oxygen

April 1, 1999
Author(s)
MVVS. Rao, Richard J. Van Brunt, James K. Olthoff
… flux-energy distributions of positive and negative ions have been measured at high electric field-to-gas density … dominant ion-molecule collision process. The less abundant ions, O + , O 2 - , and O - , exhibit non-Mawellian ion … Kinetic-energy Distributions of Positive and Negative Ions in Townsend Discharges in Oxygen …

Simplified motional heating rate measurements of trapped ions

September 19, 2007
Author(s)
Ryan Epstein, Signe Seidelin, Dietrich G. Leibfried, Janus Wesenberg, John J. Bollinger, Jason Amini, Brad R. Blakestad, Joseph W. Britton, Jonathan Home, Wayne M. Itano, John D. Jost, Emanuel H. Knill, C. Langer, R. Ozeri, Nobuyasu Shiga, David J. Wineland
… We measure motional heating rates of trapped atomic ions, a factor that influences multi-ion quantum logic gate … trap, made of gold on fused quartz, which traps ions 40~$\mu$m above its surface. Heating rates obtained from … Simplified motional heating rate measurements of trapped ions …

Two-dimensional imaging and modification of nanophotonic resonator modes using a focused ion beam

November 20, 2017
Author(s)
William R. McGehee, Thomas Michels, Vladimir A. Aksyuk, Jabez J. McClelland
… microdisk resonators using a pulsed, low-energy focused ion beam of Li+. The ion beam locally modifies the resonator structure, causing … optical resonances. Images are acquired by rastering the ion beam across the disk surface and extracting the maximum … nanophotonics, focused ion beam, microdisk resonator, imaging …

Magnetic Tunnel Junctions Fabricated Using Ion Neutralization Energy as a Tool

July 25, 2011
Author(s)
Joshua M. Pomeroy, Holger Grube, Pei-Ling Sun, Yun-Che Wang, Russell E. Lake
… degree of freedom in the devices’ fabrication. While most ion species used in common semiconductor processes (like … Highly Charged Ions, Magnetic tunnel junctions, Ion-solid interactions … Magnetic Tunnel Junctions Fabricated Using Ion Neutralization Energy as a Tool …

Individual qubit addressing of rotating ion crystals in a Penning trap

July 25, 2022
Author(s)
Anthony M. Polloreno, Ana Maria Rey, John J. Bollinger
… information processing. Scaling to larger numbers of ion qubits, potentially solved by photonic interconnects … of a strong magnetic field. However, the rotation of the ion crystal makes single ion addressability, a capability desirable for general … deformable mirror, trapped-ion quantum information processing, Penning trap, wave front …

The Potentials of Helium Ion Microscopy for Semiconductor Process Metrology

February 6, 2008
Author(s)
Michael T. Postek, Andras Vladar
… to monitor and control the manufacturing process. Helium Ion Microscopy (HIM) presents a new approach to process … the helium ions, it is theoretically possible to focus the ion beam into a smaller probe size relative to that of an … voltage and materials involved. Conversely, the helium ion beam interacts with the sample, but it does not have as …

The Helium Ion Microscope: A New Tool for Nanotechnology and Nanomanufacturing

September 1, 2007
Author(s)
Michael T. Postek, Andras Vladar, John A. Kramar, L A. Stern, John Notte, Sean McVey
… Helium Ion Microscopy (HIM) is a new, potentially disruptive … the helium ions, it is theoretically possible to focus the ion beam into a smaller probe size relative to that of an … voltage and materials involved. Conversely, the helium ion beam interacts with the sample, but it does not have as …

Elemental and Molecular Imaging of Human Hair Using Secondary Ion Mass Spectrometry

April 1, 1999
Author(s)
John G. Gillen, S V. Roberson, C M. Ng, M Stranick
… Secondary ion mass spectrometry (SIMS) is used to image the spatial … using a magnetic sector SIMS instrument operated as an ion microprobe. Analysis of electrically insulating, … spatial resolution elemental and molecular secondary ion images to be obtained from hair samples without metallic …

Reaction of Arylium Ions with the Collision Gas N2 in Electrospray Ionization Mass Spectrometry

January 9, 2015
Author(s)
Yuxue Liang, Pedatsur Neta, Yamil Simon, Stephen E. Stein
… Such peaks were found to be due to reaction of arylium ions with N2 in the collision cell. Therefore, this reaction … m/z values in an Orbitrap Elite instrument. Arylium ions were found to react with N2 in the collision cell. The … by MS3 studies, by comparison with authentic diazonium ions, and by the pressure dependence of the product ion …
Displaying 251 - 275 of 2768
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